Margaret talks to Sophie about the philosophers of the celts.

Sources:

https://irishfolklore.wordpress.com/2017/03/13/blacksmiths-and-the-supernatural/
https://folklorethursday.com/folklore-of-archaeology/ferrous-friend-foe-iron-became-enemy-fairy-folk/
https://www.thearchaeologist.org/blog/28y8zwazfxaq2tsb933b54wf0slfcj

https://www.thevintagenews.com/2017/05/02/woodhenge-is-just-as-fascinating-and-mysterious-as-its-famous-neighbor-stonehenge/

https://irishmyths.com/2022/04/29/female-druids/